Two-post three-shaft draw works



June 10, 1930. w, GOESER TWO-POST THREE-SHAFT DRAW WORKS Filed June 27, 1928 5 Sheets-Sheet 1 y/ uwhl Jhaentor 62m W @5401 B5 11' M Filo/neg June 10, 1930. E. w. GOESER 1,763,511

" TWO-POST THREE-SHAFT DRAW WORKS Filed June 27, 1928 5 Sheets-Sheet 2 9 FM W E' is? w .June 10, 1930. E, w, GOE ER 1,763,511

TWO-POST THREE-SHAFT DRAW WORKS Filed June 27, 1928 5 Sheets-Sheet 3 Inventor firm/"neg June 10, 1930. E. w. GOESER 1,763,511

TWO-POST THREE-SHAFT" DRAW WORKS Filed June 27, 1928 s Sheets-Sheet 4 fi ttarney June 10, 1930. E. GOESER 1,763,511

TWO-POST THREE-SHAFT DRAW WORKS Filed June 27, 1928 5 Sheets-Sheet 5 Etta/77g Patented June 10,.1930

nnwxn w. eonsnn, or Los nnennns, CALIFORNIA,

TWO-IPOST THREE-SHAFT DRAW WORKS Application filed. June 27,

My invention relates to draw-works which I are used in oil well derricks. The drawworks of this character include a line-shaft which is operated by a suitable prime mover. 5 Placed below the line-shaft is a drum-shaft,

which is rotated by chain and sprocket connections to the line-shaft. The drum on the drum-shaft carries a cable which extends 'over the crown block of the derrick, and 1 which forms the wire cable for the crown block'and traveling block which supports the drill pi e and other devices employed during the rilling of a well.

One of the objects of my invention is to provide a design-of draw-works which permits the use of a larger and-longer spooling drum on which the cable is wound. The advantage of this arrangement is that less strains are imposed upon the cable. When 29 a cable is bent sharply, it is strained considerabl'y In my invention the drum is of a large diameter so that the cable is not sub mitted to sharp bending. Furthermore, the drum is made longer, so that it is not neces- 25 sary to wind the cable layer upon layer-on I the drum. Another objeot of my invention is to provide a draw-works having two posts instead of. three. The common form of a drawworks includes three posts, and between two of these posts the drum is located. In my invention, by eliminating one of the posts it is possible to 'makethe drum considerably longer.

Another object of the invention is to provide a draw-works in which all the sprocketchain connections between the shafts. are located within the two posts. The advantage of this feature is that there will be no outboard sprocket-chain connections, which are always a source of danger.

A further object of the invention is to' provide a draw-works of the character mentioned, in which there are no clutches on the line-shaft. In my invention all the clutches are placed on the other shafts which are lower than the line-shaft. This is advantageous inasmuch as all of the clutch shift- 5 ing mechanism'may be located close to the derrick floor.

1928. serial No. 255,714.

A still further object of the invention i to provide a draw-works in which the drive for the rotary machine is close to the floor. The advantage of such a construction is that the chain connection is low and may be covered with a suitable guard. The guard for. this chain is low enough so that it doesnot obstruct the view in the derrick, and may be easily climbed over ifnecessary. This is quite an advantage over the old type of draw-works in which the chain extended diagonally downward from the line-shaft, It is a still further object of my invention to provide a draw-works in which the rotary table may be driven without driving the line-shaft or drum-shaft.

of this arrangement is that wear on the paratus is saved.

draw-works is avoided, and the power which would be consumed in driving the other ap- It is another object of the invention to provide a shaft in which the drum-shaft is driven at a greater number of speeds than in the ordinary draw-works.- This is advantageous, inasmuch as the speed of the drum may be better regulated to suit the operating conditions.

A still further object of the invention is to provide a draw-works in which the lineshaft is driven by a counter-shaft at a plurality of speeds.

It is another object of the invention to provide a draw-works in which the drumshaft is driven by sprocket-chain connections between the ends of the drum and the posts of the draw-works.

A still further object of the invention is to provide a draw-works in which the two' together than in the outer posts are closer ordinary draw-works.

It is an additional object of the invention to provide, in a draw-works of the'character mentioned, a simple clutch-shifting mechanism.

I have briefly enumerated the pred0mi-.

nating objects and features of the invention.

In the following description of the ferred form of the invention, other ob ects and features will be pointed out.

In the accompanying drawings,

a pie The advantage ico' ' Referrin ferred form of the invention illustrated.

to these drawings, Fi 1 1s a vertical sectional view illustratingTt e utility of the invention.

ig. 2 is a view taken as indicated by the arrow 2- of Fi 1.

Fig. 3 is a new taken as indicated by the arrow 3 of Fig. 2.

Fig. 4 is a view taken in the direction of the arrow 4 of Fig. 3.

I .rick. At one side of the derrick floor 11 is a draw-works 12, incorporating the features of my invention. The draw-works 12 is adapted to be rotated by a prime mover indicated at 13. The draw-works is adapted to wind and unwind a cable 14, and to rotate the rotary table 15, as willbe described.

later.

Referring to Figs. 2 to 6 inclusive, the draw-works includes-a pair of vertical posts 20. The lower ends of the posts 20 are secured to the floor 11 of the derrick, and the upper ends are secured to a cross-beam 21 of the derrick. As shown best in Fig. 3, braces 22 extend diagonally upward from the beams 23 of the derrick, and are connected b suitable fastening means 24 to the outer e ges of the posts 20. The posts 20, and the braces 22, are preferabl made from, steel members.

Mounted on t e braces 22, as illustrated best in Figs. 3 and 4, are bearing blocks 26, which rotatably support a counter-shaft 27. The counter-shaft 27 has a pair ofdrivensprockets 28 and 29 rigidly secured to it by means of which it maybe driven by a suitable'chain 30 which is operated by a sprocket 31 or 32 of the prime mover 13. The sprockets 28 and 29 are of different diameters, so that the counter-shaft '27 may be operated at two different speeds.

One end 34 of the counter-shaft 27 extends outward. beyond one of the posts and one of the braces, and rotatabl disposed on this end 34 is a rotary table rive-sprocket 35. The rotary table drive-sprocket 35 has a rotary table drive-chain 36 extended around it, which chain also extends around the rotary table driven-sprocket 37 of the rotary table 15. VVhen-it is desired to operate the rotary table 15, a clutch element 38. which is splined to the end 34, is shifted into engagement with the rotary table drivesprocket 35, thus-locking it to the counter shaft 27 and causing it to turn therewith.

The clutch element 38 is operated by means of a yoke member 39 pivoted on a bracket 40. The yoke member 39 is resiliently retained in the position shown in Fig.

4 by means of a coil spring 41, but ma be used so that the clutch. element 38 eng es the rotary table drive-sprocket 35 byneans of a link 42, which is pivoted to the lower end of the yoke member 39. The link 42 the clutch element 38 moves into enga ement with the rotary table'drive-s roc et 35, thus causing it to be driven y the counter-shaft 27. Rotatably mounted on the counter-shaft 27 between collars 50, is a primary line-shaft drive-sprocket 51, and a secondary lineshaft drive-sprocket 52. For connecting either of these sprockets 51 or 52 to the counter-shaft 27, I provide a clutch element .54. When the clutch element 54'is swun to the left in Fig. 4, the primary line-sha t drive-sprocket 51 is drivably connected to the counter-shaft 27,and when the clutch 'element 54 is moved to the right in Fig. 4, the secondary line-shaft drive-sprocket is .drivably connected to the counter-shaft 27.

. The clutch element 54 is moved in either direction on the counter-shaft 27 by means of a yoke member 55, which is pivoted at 56. The lower end of the yoke member 55 is connected to a horizontal ink 58. The horizontal ink 58 is connected to a lever 59, as shown inFigs. 3 and 4, which lever 59 is connected to a rotatable shaft 60. This rotatable shaft 60 extends forwardly to the inside of the derrick, and-is bent upward in order to form an operating lever 61. The operating lever 61 is swingable to move the clutch element 54 in either direction forengaging either ofthe drive-sprockets 51 or 52. Attached to the posts 20, near their upper ends, are bearin -blocks 64 which rotatably support a line-s aft 65. it will be noted, is supportedon the same The line-shaft 65,

side of the posts 20 as are the braces 22.

Rigidly secured to the line-shaft 65 in alignment with the sprockets 51 and .52, are primary and secondary line-shaft drivensprockets 66 and 67. These driven-sprockets 66 and 67 are driven by primary and second- .These drive-sprockets 72 and 73 are ri idly secured to the line-shaft 65. It Wil be noted that there are no clutches on the lineshaft. This is desirable because .it eliminates any overhanging clutch-mechanisn'l.

Mounted onthe inside of the posts 20, be-

low the line-shaft 65, are bearing-blocks 76,

which rotatably support a drum-shaft 77. The drum-shaft 77 is approximately in the same horizontal plane as the counter-shaft 27. As shown best in Fig. 2, the drum78 is rigidly secured on the drum-shaft 77. At the opposite ends of the drum 78 are standard brake constructions 79. Placed on opposite sides of the drum 78, between the ends of the drum 78 and the adjacent posts 20, are primary and'secondary drum-shaft driven-sprockets 80 and 81. These sprockets 80 and 81 are rotatably mounted on the drum-shaft 77. The primary drum-shaft driven-sprocket 80 is connected to the primary drum-shaft drive-sprocket 72 by a drum-shaft drive-chain 82, and the secondary drum-shaft driven-sprocket 81 is connected to the secondary drum-shaft drivesprocket 7 3 by means of a drum-shaft drivechain 81.

For the purpose of locking the primary drum-shaft driven-sprocket 80 to the drumshaft 7 7, I provide a clutch element 85. The clutchelement 85 is operated by a yokemcmber 86, pivoted at 87. The yoke-member 86 is resiliently retained in the position shown in Fig. 2 by means of a spring 88.

The yoke member 86 may be moved so as to cause the clutch element to engage the sprocket 80 by means of a horizontal link 89 connected to the lower end thereof. The horizontal link 89'is connected to a lever 90 which, as shown best in Fig. 6, is connected to a horizontal rota-table shaft 91. This shaft 91 extends through a lo tatable sleeve 92 to the forward part of the draw-works. On the inner end ofthe shaft 91 is connected an operating lever 98, by means of which the shaft 91 is rotated, so as to operate the mechanism which shifts the clutch element 85. As shownin Fig. 6, the sleeve 92 is rotatably supported by bearing means 95 and 96; a

The secondary drum-shaft driven-sprocket 81 may lock to the drum-shaft 77 by means of a clutch element 98. The clutch element 98 may be caused to engage the sprocket 81 by means of a yoke member 99, which is pivoted at 100. The yoke member 99 is resiliently retained in the position shown in Fig. 2 by means of a spring 102. The lower end of the yoke member 99 below the pivot 100 is connected to a lever 103, which is rigidly attached to the sleeve 92. The forward end of the sleeve 92, adjacent to, the bearing means 95, has an operating lever 10% connected to it, by means of which the sleeve 92 may be rotated so as to operate the yoke member 99 and shift the clutch element 98. r

In view of the two drum-shaft drive connections with the line-shaft 65, the drumshaft will have two speeds for every one speed of the line-shaft. Therefore, since the line-shaft has four speeds, the drum-shaft will have eight speeds. This is quite an advantage over the ordinary draw-works in which the drum-shaft may be driven only at three speeds. The advantage is that more speeds on the drum-shaft permit the operator to more efficiently operate the drum to suit operating conditions.

From the foregoing description it will be seen that the draw-works of my invention is a considerable departure from the ordinary form of draw-works, which includes of cable which must be Wound on the drum.

The feature of attaching a rotary table drive-sprocket to the counter-shaft is very importantto the invention in View of the fact that it permits the rotary table to be driven without operating the line-shaft or drum-shaft of the draw-works. The very important feature of the invention. of course, is embodied in the use of a third counter-shaft 27, which is located close to the derrick floor. -This counter-shaft is driven by the prime mover 13, and controls the operation of either the drum-shaft or the rotary machine.

I claim as my invention:

1.In a rotary draw-works, the combination "of: a pair of posts; braces for said posts; a counter-shaft rotatably supported by said braces; an operating sprocket on said counter-shaft whereby same is rotated; a rotary drive-sprocket rotatable on one end of said counter-shaft; rotary drive-sprocket clutch-means for locking said rotary drivesprocket to said counter-shaft; line-shaft drive-sprockets rotatable on said countersha'ft; line-shaft drive-sprocket clutchmeans for locking said line-shaft drivecounter-shasprockets to said'counter-shaft; a line-shaft in which said rotary' drive-sprocket is mounted on an end of said counter-shaft which extends beyond said posts.

3. In a rotary draw-works, the combination of: a supporting structure adapted to be rigidlysecured at one side of a derrick drive-sprock floor; a counter-shaft rotatably mounted on said supporting structure near the derrick floor level andhaving means whereby it may be driven by a prime mover, one end of said counter-shaft extending laterally beyond said s pporting structure; a rotary t-mounted on the extending endof said counter-shaft 'in such a position that the sprocket chain on said rotary drivesprocket may extend to the rotary machine at one side of saidsupporting structure;-a line-shaft rotatably supported by said supporting structure above and parallel to said countenshaft; chain and sprocket means whereby 'said'counter-shaft may drive said line-shaft; a drum-shaft carrymg a spooling drum,

line-shaft; and chain and sprocket means .whereb said line-shaft may'jdrive said drumaft. 4. In a rotary draw-works, the combination of: a supporting structure adapted to be'rigidly secured at one side of a derrick floor; a counter-shaft rotatably mounted on said supporting structure near the derrick floor level and having means whereby it may be driven by a prime mover, one end of said counter-shaft extending laterally beyond said supporting structure; a rotary drive-sprocket mounted on the extending end of said counter-shaft in such. a position that the sprocket chain on said rotary drivesprocket at one side of said supporting structure; av line-shaft rotatably supported by said supmay extend to the rotary machine porting structure above and parallel to sand counter-shaft; chain and sprocket means whereby said counter-shaft may drive said. line-shaft 1 clutch means for releasably connecting said chain and sprocket means which drive ,said line-shaft so that said line shaft need not bedri-ven whenever said couriterrotatably supported by said sup-- porting structure-below and parallel to said said supporting structure;

shaft is rotating; a drum-shaft carrying a spooling pfortmg structurebelow and ara lel to sai line-shaft; and chain" an sprocket means whereb .said line-shaft may drive said drum-sha y 5. In a rotary draw-works, the combinadrum, rotatably supported b said tion of: a supporting structure adapted to be rigidly secured at one .side of a derrick floor; a counter-shaft rotatably mountedon said supporting structure near the derrick floor level and having means whereby it may be driven by a prime mover, one end of sald counter-shaft extending laterally bcyond said supporting structure; a rotary drive-sprocket mounted on the extending end of said counter-shaft in such a position that the sprocket chain on said rotary drivesprocket may extend to the rotary machine at one side of said supportin structure; a line-shaft rotatably supporte by said sup porting structure above and parallel to said counter-shaft; chain and sprocket means whereby said counter-shaft may'drive said line-shaft; a drum-shaft carrying a spooling drum, rotatably supported by said support-' i-ng structure below and parallel to said line shaft, said drum-shaft being nearly in the same horizontal. plane as said counter-shaft and'bein interposed between said countershaft an the rotary machine which is driven by said rotary drive-sprocket; and chain and sprocket-means whereby said lineshaft may drive said drum-shaft.

6. In a rotary draw-works, the combination of: a supporting structure adapted to be rigidly secured at one side of a derrick .fioor; a counter-shaft rotatably mounted on saidfsupporting structure near the derrick floor level and having means whereby it may be driven by a prime mover, one on of said counter-shaft extending laterally beyond a rotary drivesprocket mounted on the extending end'of said counter-shaft in such a position that.

the sprocket chain on said rotary drivesprocket may extend to the rotary machine at oneside .of saidsu orting structure; clutch-means for releasal) y connecting said rotary drive-sprocket to said counter shaft; a line-shaft rotatably supported by said supporting structure above and parallel to said counter-shaft; chain and sprocket means whereby said counter-shaft may drive said line-shaft; clutch-means. for. releasably connecting said chain and sprocket means which drive said line-shaft so that said line-shaft need not be driven whenever said countershaft is rotating; a drum-shaft carrying a spooling drum rotatably supported by said supportin structure below and parallel to said line-s aft saidfdrum-shaft bein nearly in the same'horizontal plane as sai counter-shaft and'being interposed between said counter-shaft andthe rotary machine which is driven by said rotary drive-sprocket; and chain and sprocket means whereby said lineshaft may drive said drum-shaft.

7.- In a rotary draw Works, a unitary supporting frame comprising'uprlghts, a coun-v lei-shaft mounted in the uprights at the base iii thereof and adapted to be drlven by a prime mover, a line shaft mounted in said uprights higher than and parallel to the countershaft, a drum shaft mounted in said uprights below and parallel to the line shaft, operative connections between the countershaft and line shaft andbetween the line shaft and drum shaft, the line shaft and countershaft being on the side of the uprights opposite the drum shaft, the countershaft being ex tended at one end beyond the supporting frame, and having means mounted on said extension for establishing a drivingconnection between the countershaftt and a rotary table.

8. In a rotary draw works, a, derrick floor,

a supporting structure rigidly secured thereto at one side thereof comprising a pair of uprights, a cross member mounted on the upper end, of the uprights, braces for the uprights at the base thereof, a countershaft rotatably mounted on the braces, a sprocket on the countershaft between the braces adapted to bedriven from a prime mover, an extension at one end of the countershaft beyond the supporting structure, a sprocket mounted on said extension for driving a rotary table, a line shaft mounted on the uprights above and parallel to the counters'haft, a drum shaft mounted at the base of the uprights at the side opposite that on which the countershaft is mounted, sprocket connections between the countershaft and line shaft and adapted to drive the line shaft at a plurality of'speeds for every speed of the counter shaft, sprocket connections between the line shaft and drum shaft and adapted to drive the drum shaft at a plurality of speeds for every speed of the line shaft, clutch connections on the countershaft I and drum shaft for effecting the speed l-hanges, all the connections between the countershaft, line shaft and drum shaft being within the planes of the uprights.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 22nd day of June, 1928.

EDWIN woonsnn. 

